Lincoln Electric IDEALARC CV-300 Service Manual page 73

F-34
OUTPUT RECTIFIER BRIDGE REMOVAL & REPLACEMENT (CONTINUED)
PROCEDURE
1. Disconnect main AC input power to
the machine.
2. Remove the Case Roof and Case
Sides.
3. Test the capacitors are discharged
using a voltmeter.
a. Polarity must be observed.
4. Remove
Assembly
a. Use the steps given in the
5. Disconnect the three transformer
secondary leads connected to the
three SCR heat sinks using a 1/2"
open wrench. See Figure F. 18.
a. Disconnect leads #221, #222,
b. Note placement of leads for re-
6. Remove plug J1 from the control
board.
7. Cut any cable ties that would
restrict the removal of the assembly.
8. Disconnect the three #204 leads
connected to the bottom of the
positive SCR heat sink using a
7/16" open end wrench. See Figure
F.18.
9. Remove the four mounting screws
that fasten the rectifier assembly to
the lift bail assembly.
a. Note the placement of the
TROUBLESHOOTING & REPAIR
the Capacitor
Capacitor Bank Assembly
Removal Procedure in this sec-
tion of the manual.
and #223.
assembly.
arrangement of the insulating
materials on the mounting
screws for re-assembly.
Figure F.19.
IDEALARC CV-300
10. Remove the rectifier bridge assem-
bly carefully from the machine.
a. Clear or cut any cable ties or
leads that may hamper the
removal of the assembly.
Bank
FIGURE F.18 - Output Rectifier Bridge
INSULATION
Assembly removal.
FIGURE F.19 - Mounting screw insu-
lating material arrangement.
NOTE: If further
required, see SCR Removal and
Replacement Procedure and Diode
See
Mounting Instruction.
F-34
TRANSFORMER
SECONDARY
LEADS
disassembly is